I use basic autopilot autosteer and TACC every day driving Uber between riders. Its fine 99% of the time and the 1% is generally just quirks in the lane markings. Its achillies heel is when a road joins from a T intersection on a multilane rd and and the dotted lines are marked to show people which lane to turn in to. The car will often think the dotted line in now the right side of the lane you were in and try and jump you into the lane to your left. check out the image attached that I've made a poor effort of trying to portray this
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The management of the auto acceleration/braking has been pretty much perfect. Occasional issues with what i assume is bad map data for setting speed limits.
As was mentioned above, there is occasional "drift" on large intersections where the lines aren't marked. Ive found if you are hitting the intersection at traffic speed it has lass problems than if you are just starting off and its taking the cameras longer to find the line marking, but overall, the amount of times this affects me is miniscule.
There are also some issues in new tunnels that don't have updated map data with regard to what speed it should be doing.
This is approximately 1200km a week driving all over Sydney metro area.